NATIONAL FOREWORD

This Indian Standard (Part 71) which is identical to ISO 16610-71 : 2014 ‘Geometrical product specifications (GPS) - Filtration - Part 71: Robust areal filters: Gaussian regression filters’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Engineering Metrology Sectional Committee and approval of the Production and General Engineering Division Council.

This standard specifies the characteristics of the robust areal Gaussian regression filter for the evaluation of surfaces that may contain spike discontinuities as well as deep valleys and high peaks. It specifies in particular how to separate large scale lateral components and short scale lateral components of a surface.

This standard has been published in several parts. Other parts in this series are:

Part 1 Overview and basic concepts

Part 20 Linear profile filters - Basic concepts

Part 21 Linear profile filters - Gaussian filters

Part 22 Linear profile filters - Spline filters

Part 28 Profile filters - End effects

Part 29 Linear profile filters - Wavelets

Part 30 Robust profile filters - Basic concepts

Part 31 Robust profile filters - Gaussian regression filters

Part 32 Robust profile filters - Spline filters

Part 40 Morphological profile filters - Basic concepts

Part 41 Morphological profile filters - Disk and horizontal line-segment filters

Part 49 Morphological profile filters - Scale space techniques

Part 60 Linear areal filters - Basic concepts

Part 61 Linear areal filters - Gaussian filters

Part 62 Linear areal filters - Spline filters

Part 85 Morphological areal filters - Segmentation

The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’; and

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.